Multiple Choice Questions
Some students connect four lightbulbs of equal resistance as shown in the figure below.
 Which of these are the same circuit as the students made.
 It was D, but in case he switches it up, look at the pictures and see which matches up. What I did was look at the top of the battery and noted that it was connected to A and C, which ruled out one of the drawings, then noted that the bottom of the battery was connected only to B, and B was connected to C and D. Only one of the drawings matched.
 If lightbulb C was disconnected, what would happen to the brightness of bulb B?
 It would get dimmer.
 Rank the brightness of all the bulbs from 1 being the dimmest, and 4 being brightest. Us the same number for bulbs of equal brightness.
 A = 1 (A and D are equally bright and both the dimmest.)
 B = 4 (the brightest since it has the most current running over it.)
 C = 3 (the next brightest)
 D = 1 (A and D are equally bright and both the dimmest.)
I made a simulation of with and without C below.
Consider the drawing below.

 There is an unmarked charge in this drawing, mark it with an A
 Is point a positive, negative, or neutral?
 positive
 Draw field lines from the three marked spots by the R charge, and indicate direction.
 Which direction would the force be if you placed a +1C charge on points A and B?
 Both A and B would be to the left.
 In which drawings would you need to do the most work to move a particle from point A to B?
 I put the work would be the same because work does not care about distance in this case, just that it is moving from PE 20V to 40V.
Long Questions
I forgot to get numbers for some of these, but I have the equations, so I have put different numbers then may have been given, but the equations and answers are the same. (I may be totally wrong on any of them, but I think the are correct. Let me know if you see any errors in the questions, equations or answers.)
Q1 You have two plates (a capacitor)
Part A
You are given C and V and need to find Q.
C = 6.3μF =
V = 7.6V
Part B
You have the same plates as before except now there is a dielectric between them and now holds a charge of . Find the value of the dielectric.
[Note the varible for the dielectic constant is “k” and is always larger then 1 and has no units]
The actual answer is k = 1.5
Q 2
There is a wire with 15V and 0.33A. What is its resistance?
Q 3
There is a cell membrane where the inside is less then the outside. The thickness of the outside wall is
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